Menstrual cup Helppppppppp please

Veronica 🌱 • hates artichokes loves the dip
I hate it! It goes in fine when I fold it in a U but it won't pop back into a cup once it's in. It's driving me nuts and I'm so emotional because I'm on my period (obviously) I feel like I'm 13 yrs old, at one point it wasn't coming out and I started crying because I thought I would be stuck with it in me forever lol. How do you get it to go back into cup form once it's in? There were two sizes; I got the larger one because I figured it's better safe than sorry but ...I'm wondering if I should've gotten the smaller one. Please help. I'm on my last tampon, and I don't want to buy another box because I heard such wonderful things about the cup.